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@xmbl/cubic-ledger

v0.1.17

Published

The XMBL ledger — 9 blocks seal a face, 3 faces seal a cube; deterministic placement, micromine and cube sync.

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Links

Git

Maintainers

34r7h34r7h

Keywords

Readme

@xmbl/cubic-ledger

The ledger. Not a linear chain: transactions are hashed into blocks, 9 blocks seal a face, 3 faces seal a cube, and cubes compose into the super-cube. Membership is a pure function of the block set, so every node independently builds the identical structure — placement is derived, never negotiated.

npm install @xmbl/cubic-ledger

What it owns

| Export | What it is | |---|---| | Ledger | The store: append, read, rebuild, and the anchoring pipeline. anchorTimestampNanos / blockTimestampNanos / consensusBody / contentKey are the exact derivations consensus agrees over. | | Block, Face, Cube, SuperCube | The geometry. A block's content address is derived from the WHOLE transaction. | | calculateDigitalRoot | The digital root that drives placement. | | getBlockPosition, getFaceIndex, verifyPlacement | Deterministic placement. Where a block lands is computable by anyone and checkable by everyone. | | validateTransaction, validateShape, validateXid, getTransactionType, typeCodeOf, typeOfXid | Transaction validation and the type system. | | micromine, micromineTx, micromineBody, verifyMicromine, oidOf, type6TxBody, type7PointerBody | Micromine — the small proof-of-work each transaction carries. | | CubeSyncManager, verifyCube, planAdoption, diffWanted, setDigest, TOPIC_DIGEST, TOPIC_LIST, TOPIC_CUBE | Cube sync: the gossip topics and the adoption plan a node computes before it accepts anything. |

Determinism is the property

Two nodes given the same block set must produce byte-identical cubes, faces and roots. That is asserted directly (ledger-determinism.test.mjs, micromine.golden.test.mjs, cube-sync-adversarial.test.mjs, xid-poisoning.test.mjs) rather than assumed — an adversarial peer must not be able to steer placement, poison an xid, or make a rebuild drop value transactions.

Tests

node ../../scripts/run-node-tests.mjs .